False advertising...

I was informed that a sleeper couch was discontinued then they bring it bk at r500 more than the original price.now they have another promo and their couches also out of stock and "discontinued". The agent tells me that its part of their t&cs to change prices at their discretion. All companies honour the initial price on a "raincheck" item, and that with regards to the couch she will let her managers know that its been discontinued.really in this day and age u get companies that still take advantage of consumers?